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|
//! Completes constats and paths in patterns.
use crate::{CompletionContext, Completions};
/// Completes constats and paths in patterns.
pub(crate) fn complete_pattern(acc: &mut Completions, ctx: &CompletionContext) {
if !(ctx.is_pat_binding_or_const || ctx.is_irrefutable_let_pat_binding) {
return;
}
if ctx.record_pat_syntax.is_some() {
return;
}
// FIXME: ideally, we should look at the type we are matching against and
// suggest variants + auto-imports
ctx.scope.process_all_names(&mut |name, res| {
let add_resolution = match &res {
hir::ScopeDef::ModuleDef(def) => {
if ctx.is_irrefutable_let_pat_binding {
matches!(def, hir::ModuleDef::Adt(hir::Adt::Struct(_)))
} else {
matches!(
def,
hir::ModuleDef::Adt(hir::Adt::Enum(..))
| hir::ModuleDef::Adt(hir::Adt::Struct(..))
| hir::ModuleDef::Variant(..)
| hir::ModuleDef::Const(..)
| hir::ModuleDef::Module(..)
)
}
}
hir::ScopeDef::MacroDef(_) => true,
_ => false,
};
if add_resolution {
acc.add_resolution(ctx, name.to_string(), &res);
}
});
}
#[cfg(test)]
mod tests {
use expect_test::{expect, Expect};
use crate::{test_utils::completion_list, CompletionKind};
fn check(ra_fixture: &str, expect: Expect) {
let actual = completion_list(ra_fixture, CompletionKind::Reference);
expect.assert_eq(&actual)
}
#[test]
fn completes_enum_variants_and_modules() {
check(
r#"
enum E { X }
use self::E::X;
const Z: E = E::X;
mod m {}
static FOO: E = E::X;
struct Bar { f: u32 }
fn foo() {
match E::X { <|> }
}
"#,
expect![[r#"
en E
ct Z
st Bar
ev X ()
md m
"#]],
);
}
#[test]
fn completes_in_simple_macro_call() {
check(
r#"
macro_rules! m { ($e:expr) => { $e } }
enum E { X }
fn foo() {
m!(match E::X { <|> })
}
"#,
expect![[r#"
en E
ma m!(…) macro_rules! m
"#]],
);
}
#[test]
fn completes_in_irrefutable_let() {
check(
r#"
enum E { X }
use self::E::X;
const Z: E = E::X;
mod m {}
static FOO: E = E::X;
struct Bar { f: u32 }
fn foo() {
let <|>
}
"#,
expect![[r#"
st Bar
"#]],
);
}
}
|
